JP2007185154A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry out watering in a right and a left transplanting claws at a different period in a transplanter. <P>SOLUTION: The transplanter is composed as follows. The transplanter is equipped with a pair of right and left transplanting claws 21R and 21L for planting seedlings fed from a seedling feeding part 7 onto a field surface and a right and a left driving mechanisms 30 for driving each of the transplanting claws 21R (21L). The transplanter is designed to transmit power from an engine 30 through one driving shaft 65 for planting to each of the driving mechanisms 30 and drive the right and the left transplanting claws 21R and 21L. In the transplanter, a pair of watering pumps 91 and 91 for watering each of the right and the left transplanting claws 21R and 21L and water tanks 90 and 90 are installed. Furthermore, a cam mechanism 80 associated with the driving shaft 65 for planting is arranged to drive the right and the left watering pumps 91 and 91 with the cam mechanism 80. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes a pair of left and right transplanting nails for planting seedlings supplied from a seedling supply unit in a farm scene, and left and right drive mechanisms for driving each transplantation nail, and each drive mechanism is powered by a single drive source. It is related with the transplanting machine which transmits with the drive shaft for transplanting, drives a right and left transplanting nail, and waters simultaneously.

2. Description of the Related Art Conventionally, a transplanting machine has been known in which a pair of transplanting nails is provided in the left-right direction of the machine body, seedlings are supplied from a seedling supply unit disposed above the transplanting nails and planted in a field scene. . Such a transplanter is provided with a drive mechanism, and a pair of left and right sprockets are fixed to a planting drive shaft protruding from the transmission, and power is transmitted from each sprocket to the drive mechanism via a chain, thereby transferring the left and right transplants. It is configured to perform so-called tree-lined planting in which the nails are driven synchronously and the seedlings are planted simultaneously on the left and right without shifting the planting position of each transplanted nail with respect to the traveling direction of the traveling aircraft. An irrigation mechanism comprising a pair of irrigation pumps corresponding to the left and right transplanting claws and a water tank for storing irrigation water is provided, and both irrigation pumps are provided on the planting drive shaft when planting seedlings. Watering was performed with the left and right transplanted nails by simultaneously driving with cams and interlocking with the transplanted nails (see, for example, Patent Document 1).
JP 2003-230306 A

  However, when the drive timing of the left and right transplanting claws can be changed individually by making it possible to connect / disconnect the power from the planting drive shaft to the drive mechanism, the configuration of the conventional irrigation mechanism is left and right. There was a problem that the irrigation pump did not operate when planting seedlings with the transplanted claws, making it impossible to perform irrigation at an appropriate time.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in Claim 1, it is provided with a pair of left and right transplanting nails for planting seedlings supplied from the seedling supply unit in a farm scene, and left and right driving mechanisms for driving each transplanting nail, and each driving mechanism is supplied with a drive source. In a transplanter that transmits power through a single planting drive shaft to drive the left and right transplanted claws, the left and right transplanted nails each have a pair of irrigation pumps and a water tank, A cam mechanism interlocking with the planting drive shaft is provided, and the left and right irrigation pumps are driven by the cam mechanism.

  According to a second aspect of the present invention, the cam mechanism has a cam attached to a cam shaft that is arranged and driven in parallel with the planting drive shaft, and contacts one end of the rod of the irrigation pump to the cam. The irrigation pump is driven by rotation.

  According to a third aspect of the present invention, the left and right cams on the cam shaft are attached to the cam shaft such that the phase can be changed and the cam shaft can be attached and detached.

  According to a fourth aspect of the present invention, the planting drive shaft is provided with a pair of left and right power connection / disconnection means for connecting / disconnecting power from the planting drive shaft to the left and right drive mechanisms, and the power connection / disconnection unit is connected to the cam. It is configured to be able to switch between connecting and disconnecting power by operating by rotation of the power.

  According to a fifth aspect of the present invention, a plurality of pairs of the left and right transplanted claws are provided side by side in the axial direction of the planting drive shaft together with the irrigation pumps corresponding to the transplanted claws.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, when the driving timing of the left and right transplanting nails can be individually changed by making it possible to connect and disconnect the power from the planting drive shaft to the driving mechanism, the transplanting nails on the driving side The irrigation pump corresponding to the above can be driven according to the planting time of the seedling with the transplanted nail, and irrigation can be appropriately performed at different times with the right and left transplanted nails.

  In claim 2, it becomes possible to change the drive timing of the irrigation pump according to the shape of the cam provided in the cam mechanism. Therefore, it is possible to adjust the driving time of the irrigation pump according to the planting time of the seedling by the transplanted nail and perform irrigation at an appropriate time.

  In claim 3, the left and right cams are attached in the same phase around the cam shaft, and the left and right irrigation pumps can be easily driven in synchronization. Therefore, it is possible to cope with a case where the left and right transplanted nails are configured to be driven simultaneously.

  According to the fourth aspect of the present invention, irrigation can be performed by driving the irrigation pump so as to interlock with the transplanting claw without increasing the number of parts. In addition, a mechanism for performing irrigation can be realized in a space-saving manner.

  In Claim 5, it becomes possible to make a transplant machine respond | correspond to the planting of multiple articles | stripes, such as four, six, eight.

  Next, embodiments of the invention will be described.

  1 is a side view showing the overall configuration of a transplanter according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a rear view of the transplanted portion, FIG. 4 is a side view of the transplanted claw, and FIG. Is a skeleton diagram showing the power transmission mechanism of the transplanter, FIG. 6 is a partial sectional plan view of the power connection / disconnection means and cam mechanism, FIG. 7 is a side view of the power connection / disconnection means, cam mechanism and irrigation mechanism, and FIG. FIG. 9 is a plan view of the irrigation mechanism, FIG. 10 is a side view of the cam mechanism, and FIG. 11 is a side view of the drive sprocket position holding mechanism provided in the power connection / disconnection means.

  First, the overall configuration of a transplanter according to an embodiment of the present invention will be described. As shown in FIGS. 1 and 2, in the transplanter 1, the engine 3 is mounted on the front part of the body frame 2, and the transmission includes a traveling transmission 4 </ b> A and a planting transmission 4 </ b> B on the front and rear halfway parts. A case 5 is provided. A handle frame 6 serving as a handle member is continuously provided on the rear portion of the body frame 2 and extends rearwardly from the body frame 2 in a substantially horizontal direction. And the seedling supply part 7 is provided on the middle part before and after this handle frame 6, and the driving | operation operation part 9 is comprised by the rear part.

  A front wheel support shaft 10 extending in the left-right direction is supported at the front part of the body frame 2 at the middle part in the left-right direction. One end of a front wheel support frame 11, 11 is attached to the left and right sides of the front wheel support shaft 10, and the front wheel 12, 12 is rotatably supported on the other end of the front wheel support frame 11, 11.

  Further, in the vicinity of the front and rear halfway of the body frame 2, the rear wheel drive shaft 13 protrudes in the left-right direction from the traveling transmission 4 </ b> A of the transmission case 5. One end of a drive case 14 is connected to the left and right sides of the rear wheel drive shaft 13, and a rear wheel 15 is rotatably supported on the rear end of the drive case 14.

  The front wheel support frame 11 and the drive case 14 are connected via a link mechanism, and the hydraulic cylinder 16 provided at the lower part of the machine body frame 2 and the drive case 14 are connected via a link mechanism. The front wheel support frame 11 and the drive case 14 are rotatable about the front wheel support shaft 10 and the rear wheel drive shaft 13, respectively, by the expansion and contraction of the hydraulic cylinder 16. Thereby, the traveling machine body can be moved up and down.

  In the seedling supply unit 7 on the handle frame 6, a plurality of seedling transport pots 17 are connected in an oval shape so as to be rotatable on a horizontal plane. Each seedling transport pot 17 has a lid that can be opened and closed at the bottom, and when transported to an appropriate position above the transplanting section 20, the lid is opened to open the bottom and is held in the seedling transport pot 17. The seedlings are dropped and supplied to the transplant unit 20.

  On the left and right sides and above the seedling supply section 7, seedling mounts 18, 18, 19 are arranged. Each seedling stage 18 is attached to the handle frame 6 on which a seedling for transplantation is placed. The seedlings on the seedling stage 18 are replenished to the seedling transport pot 17 emptied sequentially from the seedling stage 18 by the operator during the transplanting operation.

  The transplant unit 20 is disposed below the seedling supply unit 7 and behind the mission case 5. The transplant section 20 is provided with a pair of left and right transplant claws 21L and 21R, and the respective transplant claws 21L and 21R can be opened and closed and moved up and down by the drive mechanisms 30 and 30. The transplanting claws 21L and 21R are closed when they are raised, hold the seedling falling from the seedling transport pot of the seedling supply section at the rising end, and the tip of the seedling is lowered and entered the field scene to reach the falling end. It is sometimes opened and configured to plant seedlings in the field scene.

  After the seedlings are thus supplied from the seedling transport pot 17 of the seedling supply unit 7 to the left and right transplanting nails 21L and 21R of the transplanting unit 20, and planted in the field scene with the transplanting nails 21L and 21R, The soil is covered with soil covering the roots of the seedlings by the soil covering rings 23 and 23 disposed behind the transplanting claws 21L and 21R. Thus, the transplantation of one seedling by the transplanter 1 is completed.

  Next, the configuration of the transplanter 20 will be described in detail. As shown in FIGS. 3 and 4, the transplanting unit 20 includes a driving mechanism 30 that drives a pair of left and right transplanting claws 21 </ b> L and 21 </ b> R that convey seedlings from the seedling supply unit 7 to the farm scene, and transplanting claws 21 </ b> L and 21 </ b> R, respectively.・ 30 is provided. The drive mechanisms 30 and 30 connect the rotary cases 32 and 32 disposed on the left and right sides of the transplanting claws 21L and 21R, the lifting guides 33 and 33 disposed on the left and right sides of the transplantation claws 21L and 21R, respectively. It consists of arms and links.

  In each of the left and right drive mechanisms 30, one end of a fulcrum shaft 34 projecting from the frame 31 on the body frame 2 in the left-right direction is projected into the rotary case 32, and the rotary case 32 rotates on the fulcrum shaft 34. It is supported freely. A driven sprocket 35 is fixed to the outer peripheral portion of the fulcrum shaft 34 on the outer side surface of the rotary case 32, and the power from the planting transmission 4 </ b> B is transmitted to the rotary case 32 via the sprocket 35. Is configured to be driven to rotate about the fulcrum shaft 34.

  In the rotary case 32, a first gear externally fitted to the fulcrum shaft 34, a second gear rotatably supported by the rotary case 32, and an output shaft 36 protruding to the opposite side of the sprocket 35 are externally fitted. The third gear is arranged in series, and these gears are sequentially meshed. One end of an arm 37 is fixed to the output shaft 36 outside the rotary case 32.

  Here, the first gear and the third gear are formed so that the number of teeth is two-to-one, and when the rotary case 32 rotates once with respect to the fulcrum shaft 34, the arm 37 is in the opposite direction to the rotary case 32. It is set as the structure rotated once. As a result, when the rotary case 32 is rotationally driven by the power from the planting transmission 4B, the arm 37 is pivoted about the fulcrum shaft 34 with respect to the machine body.

  One end of a connecting shaft 39 is fixed to the other end of the arm 37, and one side (front side) of the graft claw support 40 is rotatably supported on the connecting shaft 39 through a bearing in accordance with the width of the strip. ing. The transplant nail support 40 is composed of left and right plates, and an opening / closing cam 41 is fixed on a connecting shaft 39 between the left and right plates.

  A funnel-shaped cup 40a for receiving the seedling from the seedling supply unit 7 is formed on the other side (rear side) of the transplanting nail support 40, and the transplanting nail 21 is disposed below the cup 40a. The fulcrum shafts 43 and 43 are provided in the left and right horizontal directions at the front and rear positions separated by the same distance from the front and rear center of the cup 40a, and the front and rear ends of the graft claw 21L (21R) are supported by the fulcrum shafts 43 and 43, respectively. .

  The transplanting claw 21L (21R) is composed of beak-shaped claw portions 21a and 21a formed substantially symmetrically in the front-rear direction, and is closed by holding them together in the front-rear direction and opened by separating the front and rear. It is configured so that the seedling can be dropped in a state of being in a wet state. The upper and lower claw portions 21a and 21a are pivotally supported by pivot shafts 44 and 44 provided on the left and right sides at the front and rear center of the cup 40a, and are connected to the front and rear. Then, springs 49 and 49 are interposed between the pivot shafts 44 and 44 and the upper portion of the cup 40a so as to lift the pivot shafts 44 and 44 by the biasing force. -21a is closed together.

  Further, one end of a contact arm 45 is pivotally supported on a fulcrum shaft 43 that supports the claw portion 21 a on the opening / closing cam 41 side of the transplanting claw 21, and a roller 46 is connected to the opening / closing cam 41 at the other end of the contact arm 45. It is provided so that it may contact | abut to the outer periphery. Thus, the claw portion 21a can be rotated by the contact arm 45 that rotates according to the outer peripheral shape of the opening / closing cam 41 when it rotates.

  A claw opening / closing amount adjusting mechanism 47 is provided between the abutting arm 45 and the upper portion of the claw portion 21a. The claw opening / closing amount adjusting mechanism 47 is a bolt 48 between both the abutting arm 45 and the claw portion 21a. And the bolt 48 is rotated to adjust the distance between the two so that the amount of rotation of the claw portion 21a can be adjusted.

  In this way, the claw portion 21a is biased by the springs 49, 49 so as to close the graft claw 21, and its rotation is regulated by the opening / closing cam 41 that contacts the contact arm 45 via the roller 46. Yes. That is, the transplanting claw 21 is always urged in the closing direction, but the opening / closing cam 41 is controlled to be opened and closed by forcibly opening the claw portion 21a through the contact arm 45 through the contact arm 45. Yes.

  Further, an extending portion 40b extending upward is formed at the front portion of the graft nail support 40, and a support shaft 50 is provided on the extending portion 40b so as to protrude toward the lifting guide 33. A roller 51 is provided at the projecting end of the support shaft 50, and is inserted into an elevating guide 33 extending in the vertical direction so as to be able to roll, and is configured to guide the transplanting claw 21 during elevating.

  In such a configuration, when power is transmitted from the planting transmission 4B to the drive mechanism 30 in the transplanting part 20, the transplanting claw 21L (21R) is closed at the rising end, and between the front and rear claw parts 21a and 21a. The seedlings from the seedling supply unit are supplied and held. In this state, the transplanting claw 21L (21R) is lowered along the raising / lowering guide 33 along with the rotation of the rotary case 32, and when reaching the lowering end, the opening / closing cam with the claw portion 21a entering the soil surface portion of the field. By rotating 41, the claw portion 21a is rotated back and forth about the fulcrum shaft 43 via the contact arm 45, the transplanting claw 21L (21R) is opened, and seedlings are planted in the field scene. After planting, the transplantation claw 21L (21R) is raised by the further rotation of the rotary case 32, and is closed by the rotation of the opening and closing cam 41 in the process up to the rising end. This is repeated, and seedlings are planted by the transplanting claws 21L (21R).

  Next, the power transmission mechanism of the transplanter will be described. As shown in FIG. 5, the power of the engine 3 as a drive source is transmitted from the output shaft 61 to the input shaft 62 of the traveling transmission 4A via a pulley or a belt. The power input to the traveling transmission 4A is shifted through a gear mechanism or the like, and then transmitted to the rear wheel drive shaft 13. Further, the rear wheel 15 is transmitted through a sprocket, a chain, or the like provided in the drive case 14. Is transmitted to.

  The power shifted by the traveling transmission 4A is transmitted from the output shaft 63 to the input shaft 64 of the planting transmission 4B via a pulley or a belt. The power input to the planting transmission 4B is shifted by a gear mechanism or the like and then transmitted to the planting drive shaft 65. The planting drive shaft 65 protrudes in the left-right direction from the rear upper part of the transmission case 5, and power can be transmitted from the planting transmission 4 </ b> B to the seedling supply unit 7 and the transplant unit 20 via the planting drive shaft 65. It is said that.

  That is, the power from the planting transmission 4B is transmitted from one end of the planting drive shaft 65 to the input shaft 68 of the seedling supply unit 7 through the speed reduction mechanism 66 and the gear mechanism 67 such as a sprocket and a chain. .. Are transmitted from the input shaft 68 through the drive sprocket and the driven sprocket to the seedling transport pots 17, 17. Thus, the seedling transport pots 17, 17... Are transported so as to draw an elliptical locus, and seedlings can be supplied from the seedling transport pot 17 to the transplanting claws 21 L and 21 R of the transplanting unit 20 at an appropriate position as described above. ing.

  The power from the planting transmission 4B is transmitted from the other end of the planting drive shaft 65 to the left and right transplanting claws 21L and 21R of the transplanted part via a sprocket and a chain. Is transmitted to each of the transplantation claws 21L and 21R by each drive mechanism 30. Thus, the transplanting claws 21L and 21R can be raised and lowered along the raising / lowering guide 33, and can be appropriately opened / closed according to the raising / lowering position, that is, receiving and holding seedlings that are closed at the rising end and fall from the seedling transport pot 17. However, it is configured to open at the descending end so that the seedling can be planted in the field scene.

  In such a power transmission mechanism, a pair of left and right powers for connecting and disconnecting power to the drive mechanisms 30 and 30 between the planting transmission 4B and the drive mechanisms 30 and 30 of the left and right transplanting claws 21L and 21R. Means 72 and 72 are provided, and the driving timing of the left and right transplanting claws 21L and 21R can be changed by the power interrupting means 72 and 72.

  Next, the power interrupting means 72 and 72 will be described. As shown in FIGS. 6 and 7, the left and right power interrupting means 72 and 72 are provided on a planting drive shaft 65, which is an extension shaft 65a integrally connected to the planting drive shaft 65 in this embodiment. ing. The extension shaft 65a is disposed in front of the left and right drive mechanisms 30 and 30, and drive sprockets 73 and 73 are disposed on both the left and right sides of the extension shaft 65a as transmission members for transmitting power to the drive mechanisms 30 and 30. . The drive sprockets 73 and 73 are loosely fitted to the extension shaft 65a so as to be rotatable relative to each other, and are linked to the driven sprockets 35 and 35 provided in the rotary cases 32 and 32 of the drive mechanisms 30 and 30 via the chains 74 and 74. Yes.

  A clutch body 75 is disposed on the left and right sides of the left and right drive sprockets 73. The clutch body 75 is fitted to the extension shaft 65a so as not to be relatively rotatable, and is slidable in the axial direction. The clutch body 75 includes a conical contact portion 75a and a disk-shaped engagement portion 75b whose center is located at the top of the corresponding contact portion 75a. The engagement portion 75b has an engagement hole 75c and is disposed on the drive sprocket 73 side. A clutch pin 73a serving as an engagement body protruding from the drive sprocket 73 in the engagement hole 75c is a sliding position of the clutch body 75. It is possible to engage according to.

  A clutch spring 76 is disposed on the opposite side of the clutch body 75 from the drive sprocket 73. The clutch spring 76 is fitted to the extension shaft 65a and is provided in contact with the contact portion 75a. The clutch spring 75 is urged toward the drive sprocket 73 by the clutch spring 76, and is slid to the engagement position where it engages with the clutch pin 73a through the engagement hole 75c. That is, the clutch body 75 is normally held at the engaged position, not at the idle position where it is not engaged with the clutch pin 73a.

  Therefore, when the clutch body 75 is engaged with the clutch pin 73a through the engagement hole 75c, the clutch body 75 and the drive sprocket 73 are integrated and integrated with the extension shaft 65a (planting drive shaft 65). Rotate. This state is a power connection state, power is transmitted from the planting drive shaft 65 to the drive mechanism 30, and the transplanting claw 21L (21R) is driven. On the other hand, when the clutch body 75 does not engage with the clutch pin 73a through the engagement hole 75c, the drive sprocket 73 idles with respect to the extension shaft 65a (planting drive shaft 65). This state is a power cut state, power is not transmitted from the planting drive shaft 65 to the drive mechanism 30, and the transplanting claw 21L (21R) is maintained in a stopped state. In this way, left and right power interrupting means 72 and 72 are configured.

  Further, as shown in FIGS. 6 and 11, a drive sprocket 73 interlockingly connected to the drive mechanism 30 of the left transplanting claw 21L is erected so that a pin 77 protrudes laterally. 78 is rotatably supported. A spring 79 is inserted between the bracket 78 and the arm 25 provided on the machine body frame 2, and the driving sprocket is held at a predetermined rotational position by the urging force, thereby the clutch body 75 and the clutch pin. When 73a is in the disengaged state, the transplanting claw 21L is configured to be maintained at the rising end, that is, the seedling supply position where the seedling is supplied from the seedling supply unit 7. Although not shown, the drive sprocket 73 linked to the drive mechanism 30 of the right transplant claw 21R has the same structure as described above, and when the clutch body 75 and the clutch pin 73a are in the disengaged state, the transplant claw 21L It is comprised so that it may be maintained in the state located in the rising end. The position holding mechanism of the drive sprocket 73 configured in this way prevents the two transplanting claws 21 from being simultaneously pierced into the field scene, and even if one of the transplanting claws 21L (21R) is in the lowered position at the start of the work. If it is lifted by moving it or the like, the other does not descend, and it is possible to avoid damaging the transplantation claw 21L (21R).

  A cam mechanism for switching the engagement state between the clutch body 75 and the clutch pin 73a of the left and right power interrupting means 72, 72 and connecting / disconnecting power from the planting drive shaft 65 to the left and right drive mechanisms 30. 80 is provided on the extension shaft 65a. The cam mechanism 80 includes a cam shaft 81 that is driven in parallel with the extension shaft 65a, and left and right cams 82L and 82R provided on the cam shaft 81 so as to face the left and right clutch bodies 75 and 75, respectively. The left and right cams 82L and 82R are attached to the cam shaft 81 so as not to rotate relative to each other.

  The cams 82L and 82R include projecting portions 82La and 82Ra and notches 82Lb and 82Rb, and are formed in a substantially half-moon shape in a side view. When the cams 82L and 82R are rotated integrally with the rotation of the cam shaft 81, the cams 82L and 82R are brought into contact with the contact portions 75a and 75a of the clutch bodies 75 and 75 at the engagement positions by the protrusions 82La and 82Ra. The clutch body 75 and 75 are slid to the idling position while being pushed against the driving sprocket 73 against the biasing force of the clutch springs 76 and 76 by further rotation, and the clutch body 75 and the clutch pin 73a are engaged. It is supposed to cancel the match.

  The left and right cams 82L and 82R are fixed to the cam shaft 81 by shifting the phase around the cam shaft 81 by 180 degrees, and by rotation of the cam shaft 81, one cam 82L (82R) is a clutch body at the projecting portion 82La (82Ra). When the second cam 82R (82L) comes into contact with the 75 abutting portion 75a and is in a rotational position where the clutch body 75 and the clutch pin 73a are disengaged, the other cam 82R (82L) is a clutch for the notch 82Rb (82Lb). Since it does not act on the body 75, the clutch body 75 is slid by the urging force of the clutch spring 76 so that the contact portion 75a is moved to a rotational position where the clutch body 75 and the clutch pin 73a are engaged. Has been placed.

  Here, of the left and right cams 82L and 82R, one cam 82L (82R) is attached to the cam shaft 81 via the key 85 so that the phase angle can be changed and the cam 82 can be attached and detached. Specifically, a key groove is formed on one side of the cam shaft 81 and a key 85 is fitted, and key grooves 81a and 81b that can be engaged with the key 85 are provided in the boss portion 82d of one of the left and right cams. The cam 82 </ b> L (82 </ b> R) is detachably attached to the cam shaft 81 via a key 85, with the position being shifted 180 degrees around the circumference. Thus, in this embodiment, the left and right cams 82L and 82R are attached around the cam shaft with a phase shifted by 180 degrees, but can be attached around the cam shaft in the same phase. However, the phase changing mechanism is not limited to the configuration using the key, and the cam 82 and the cam shaft 81 can be connected by spline fitting or serration fitting to shift the phase. It is.

  A first gear 83 is fixed to the left and right middle portion of the extension shaft 65a of the planting drive shaft 65, and a second gear 84 is fixed to the left and right middle portion of the cam shaft 81. 83 and the second gear 84 are meshed with each other. The first gear 83 and the second gear 84 are formed to have a gear ratio of 1: 2, and power is transmitted from the extension shaft 65a to the camshaft 81 via the first gear 83 and the second gear 84. The cam shaft 81 is configured to rotate at half the rotational speed of the extension shaft 65a (planting drive shaft 65).

  In such a configuration, when the extension shaft 65a rotates once, the cam shaft 81 rotates halfway through the first gear 83 and the second gear 84, and as shown in FIG. (82R) is in contact with the contact portion 75a of the clutch body 75 at the protruding portion 82La, and the clutch body 75 is slid in the axial direction to the idling position against the clutch spring 76, and the clutch body 75 and the clutch pin 73a Release the engagement. As a result, the clutch body 75 and the drive sprocket 73 are unfixed, the drive sprocket 73 is idled with respect to the extension shaft 65a, the power to the drive mechanism 30 is cut off, and the left and right transplant claws 21L (21R ) Is stopped.

  At this time, the left and right cams 82R (82L) are separated from the contact portion 75a of the clutch body 75 at the notch 82Rb (82Lb), as shown in FIG. 8B. At the same time, the clutch body 75 is slid from the idling position to the engagement position by the urging force of the clutch spring 76, and the clutch body 75 and the clutch pin 73a are engaged. As a result, the clutch body 75 and the drive sprocket 73 are fitted and fixed, and the drive sprocket 73 is rotated integrally with the extension shaft 65a, so that power is transmitted to the drive mechanism 30 and the other graft claw 21R. (21L) is driven.

  Then, while the extension shaft 65a further rotates, the cam shaft 81 is further rotated halfway, and the left and right cams 82L and 82R on the cam shaft 81 are rotated to the rotation positions opposite to the above, and the left and right cams 82L are rotated. The clutch body 75 and the clutch pin 73a are engaged on the side, and the engagement between the clutch body 75 and the clutch pin 73a is released by the other cam 82R. That is, contrary to the above, one of the left and right transplanting claws 21L (21R) is driven, and the driving of the other transplanting claw 21R (21L) is stopped.

  In this manner, in the transplanter 1 of this embodiment, the power of the left and right transplanted claws is cut off by the power interrupting means 72 after one transplanted claw 21L (21R) reciprocates up and down once as the extension shaft 65a rotates. The left and right transplanting claws 21L and 21R are driven alternately so that the other grafting claw 21R (21L) is driven by power transmitted by the power interrupting means 72, and one grafting claw 21L (21R) is driven. The so-called staggered planting is performed in which the seedling transplanting position by the other 21R (21L) is shifted by a half pitch with respect to the traveling direction of the traveling machine body to plant the seedling. The seedling supply unit 7 is configured to be driven in synchronization with the transplanting unit 20 driven in this manner by the speed reduction mechanism 66.

  Finally, an irrigation mechanism for irrigating the transplantation nails 21L and 21R will be described. As shown in FIGS. 7 and 9, the irrigation mechanism includes water tanks 90 and 90 and irrigation pumps 91 and 91 provided in the body frame 2, irrigation pipes 92 and 92 inserted into transplant claws 21L and 21R, and A communication member such as a pipe or a hose that connects the members is provided. A pair of irrigation pumps 91 and 91 are provided so as to correspond to the left and right transplanting claws 21L and 21R. The irrigation pumps 91 and 91 are disposed in front of the cams 82L and 82R provided on the left and right outer sides of the cam shaft 81. It is fixed to. The fixed plate 93 is fixed to the upper end of a support frame 94 that is erected on a part of the body frame 2 via a stay or the like.

  The irrigation pump 91 houses a spring in the cylinder 91a and urges the rod 91b in the extending direction. The tip of the rod 91b projects from the upper part of the cylinder toward the cam 82L (82R), and the tip of the rod 91b The roller 95 is rotatably supported on the fixed plate 93. Then, the roller 95 is brought into contact with the cam 82L (82R) on the cam shaft 81, and the roller 95 is moved up and down according to the rotation of the cam 82L (82R), that is, the rod 91b is expanded and contracted via the roller 95. The irrigation pump 91 is configured to be driven.

  Further, a suction port 91c for sucking water from the water tank 90 and a discharge port 91d for discharging water to the irrigation pipe 92 are provided in the lower part of the cylinder 91a of the irrigation pump 91, and the inside of the cylinder 91a. Connected to the intake and discharge valves. The irrigation pump 91 is communicated with the water tank 90 and the irrigation hose 96 at the suction port 91c, and is communicated with the irrigation pipe 92 and the irrigation hose 97 at the discharge port 91d. As shown in FIG. 4, the irrigation tube 92 is supported by the graft nail support 40 and inserted into the graft nail 21L (21R) so that the tube opening faces downward.

  In such a configuration, when power is transmitted from the planting drive shaft 65 and the cam shaft 81 is rotated, the cam 82L (82R) is also rotated accordingly, and the roller that contacts the cam 82L (82R). 95 is moved up and down. At this time, when the roller 95 comes into contact with the notch 82Lb (82Rb) of the cam 82L (82R), the rod 91b is in an extended state, and water is sucked into the irrigation pump 91 from the water tank 90 through the irrigation hose 96. The

  From this state, as shown in FIG. 10A, the roller 95 is formed between the notch 82Lb (82Rb) and the protrusion 82La (82Ra) of the cam 82L (82R) by the rotation of the cam 82L (82R). When the switching portion 82Lc (82Rc) is reached, the roller 95 is pressed by the switching portion 82Lc (82Rc), and the rod 91b is gradually contracted. Thereby, water is discharged toward the irrigation pipe 92 from the irrigation pump 91 via the irrigation hose 97, and irrigation is started in the transplantation claw 21L (21R). As shown in FIG. 10 (b), when the roller 95 reaches the protrusion 82La (82Ra), the rod 91b is compressed, the protrusion of water from the irrigation pump 91 is stopped, and irrigation is terminated.

  The pair of irrigation pumps 91 and 91 are only those corresponding to the driving-side transplanting claw 21L (21R) among the left and right transplanting claw 21L and 21R that are alternately driven by the cam mechanism 80 as described above. , And is configured to be driven in conjunction with the transplantation claw 21L (21R). The drive timing of the irrigation pump 91 is set so that the grafting claw 21L (21R) starts to descend from the ascending end by the cams 82L and 82R, and irrigation starts and ends before reaching the descending end.

  With this configuration, in the irrigation mechanism, the cam mechanism 80 for operating the power interrupting means 72 and 72 can be used also as the drive mechanism for the irrigation pumps 91 and 91. Then, the irrigation pump 91 corresponding to the driving-side transplantation claw 21L (21R) is driven, and the water in the water tank 90 is supplied to the irrigation pipe 92 inserted into the transplantation claw 21L (21R) at the time of planting. Thus, the seedling can be stably held in the soil when the seedling is planted by the transplanting claw 21L (21R), and the water supply operation immediately after planting is not required. Furthermore, it is possible to improve the sliding of the seedlings from the transplanted claws 21L and 21R that are opened at the time of planting by irrigation, and to remove soil adhering to the inner peripheral surface of the transplanted claws 21L and 21R.

  As described above, the pair of left and right transplanting nails 21L and 21R for planting the seedling supplied from the seedling supply unit 7 in the field scene and the left and right driving mechanisms 30 for driving the transplanting claws 21L (21R) are provided. In a transplanter that transmits the power from the engine (drive source) 3 to the mechanism 30 via a single planting drive shaft 65 to drive the left and right transplanting claws 21L and 21R, the left and right transplanting claws 21L and 21R A pair of irrigation pumps 91 and 91 for irrigating each of them and water tanks 90 and 90 are provided, and a cam mechanism 80 linked to the planting drive shaft 65, here, the extension shaft 65a is provided. Since the left and right irrigation pumps 91 and 91 are driven, the drive timing of the left and right transplanting claws 21L and 21R can be adjusted by making it possible to connect and disconnect the power from the planting drive shaft 65 to the drive mechanism 30, for example. Can be changed individually When configured, the irrigation pump 91 corresponding to the driving-side transplantation claw 21L (21R) is driven according to the planting time of the seedling by the transplantation claw 21L (21R), and irrigation is performed by the right and left transplantation nails 21L and 21R. Can be done appropriately at different times.

  In addition, the cam mechanism has cams 2L and 82R attached to a cam shaft 81 that is driven in parallel with the planting drive shaft 65, and the rods 91b and 91b of the irrigation pumps 91 and 91 are attached to the cams 82L and 82R. Since the irrigation pumps 91 and 91 are driven by the rotation of the cams 82L and 82R by contacting one end, the drive timing of the irrigation pumps 91 and 91 can be changed depending on the shape of the cams 82L and 82R. . Therefore, it is possible to adjust the driving timing of the irrigation pumps 91 and 91 according to the planting timing of the seedlings by the transplanting claws 21L and 21R, and perform irrigation at an appropriate timing.

  Further, the left and right cams 82L (82R) on the cam shaft 81 are attached to the cam shaft 81 in such a manner that the phase can be changed and can be attached and detached, so that the left and right cams 82L and 82R are mounted around the cam shaft. The left and right irrigation pumps 91 and 91 can be driven in synchronization with each other. Therefore, it is possible to cope with the case where the left and right transplanting claws 21L and 21R are configured to be driven simultaneously.

  The planting drive shaft 65, here the extension shaft 65a, is provided with a pair of left and right power connection / disconnection means 72 and 72 for connecting and disconnecting power from the extension shaft 65a to the left and right drive mechanisms 30 and 30, Since the power connection / disconnection means 72/72 is operated by the rotation of the cams 82L / 82R so that the power connection / disconnection can be switched, the irrigation pumps 91/91 can be connected to the transplantation claw 21L without increasing the number of parts. -It can be driven to work in conjunction with 21R for irrigation. In addition, a mechanism for performing irrigation can be realized in a space-saving manner.

  Further, in the transplanter 1, a pair of left and right transplant claws 21L and 21R are provided side by side in the axial direction of the planting drive shaft 65 together with the irrigation pumps 91 and 91 corresponding to the transplant claws 21L and 21R. Is also possible. Therefore, the transplanter 1 can be adapted not only to two-row planting but also to multiple-row planting such as four, six, and eight.

The side view which shows the whole structure of the transplanter which concerns on one Example of this invention. FIG. The rear view of a transplant part. Side view of the transplanted nail. The skeleton figure which shows the power transmission mechanism of a transplant machine. The partial cross-section top view of a power connection / disconnection means and a cam mechanism. The side view of a power connection / disconnection means, a cam mechanism, and an irrigation mechanism. The side view of a cam mechanism. (A) The figure which shows a power disconnection state. (B) The figure which shows a power connection state. The top view of an irrigation mechanism. The side view of a cam mechanism. (A) The figure which shows the time of irrigation start. (B) The figure at the time of the end of irrigation. The side view of the position holding mechanism of the drive sprocket with which a power connection / disconnection means is equipped.

Explanation of symbols

3 Engine (drive source)
21L / 21R transplanting claw 30 drive mechanism 65 planting drive shaft 72 power connection / disconnection means 80 cam mechanism 81 cam shaft 81a / 81b keyway 82L / 82R cam 85 key 90 water tank 91 irrigation pump

Claims (5)

Equipped with a pair of left and right transplanting nails for planting seedlings supplied from the seedling supply unit in the field, and left and right drive mechanisms for driving each transplantation nail, each drive mechanism is powered by a single drive source In a transplanter that transmits via a drive shaft and drives the left and right transplanting nails,
A pair of irrigation pumps for irrigating each of the left and right transplanting claws, and a water tank, provided with a cam mechanism linked to the planting drive shaft, and configured to drive the left and right irrigation pumps by the cam mechanism A transplanter characterized by that.   The cam mechanism has a cam mounted on a cam shaft that is driven in parallel with the planting drive shaft, contacts one end of the rod of the irrigation pump to the cam, and drives the irrigation pump by rotating the cam. The transplanter according to claim 1, wherein the transplanter is configured as described above.   The transplanter according to claim 2, wherein the left and right cams on the cam shaft are attached to the cam shaft such that the phase can be changed and the cam shaft can be attached and detached.   The planting drive shaft is provided with a pair of left and right power connecting / disconnecting means for connecting / disconnecting power from the planting drive shaft to the left and right drive mechanisms, and the power connecting / disconnecting means is operated by rotation of the cam. The transplanter according to any one of claims 1 to 3, wherein the power connection / disconnection is switchable. 5. The pair of left and right transplanted claws are provided in a plurality of pairs in the axial direction of a planting drive shaft together with an irrigation pump corresponding to each transplanted claw. 6. Transplanter.

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